I found this while organizing a storage room. I believe it's quite old, probably over 40 years old. It's a sturdy construction with a wooden handle, but the rubber stamp is deteriorated due to poor storage. Please check the condition in the photos. I haven't tested it. [Size] Stamp face: 6 cm (H) x 4.3 cm (W) x 1 cm (D) Handle length: 5 cm [Characters] '0' to '9', '+', '÷', '=' * '―' is represented by '1' * '✕' can be substituted by rotating '+' Some parts are severely deteriorated and the numbers may not stamp properly (e.g., 0). Perhaps more suitable for a collection than for practical use. There is no original box, so I will use recycled materials for packaging. If you are interested, please consider purchasing.